Analytic Hierarchy Processing is a method to simplify decision making. If you have many options and many needs, selecting the correct option can be very difficult. If you break it down into a series of small decisions, it is often much simpler. AHP is generally considered to be statistically accurate. Its primary value is, however, to create an ordered list of options based on a complex set of criteria. So if you have 20 projects to complete and you want to know which ones to do first, you can use AHP. If you have a dozen vendors and you want to know which ones to interview, you can use AHP. For anything with complex criteria and many options, use AHP.